/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.dx.cf.attrib;

import com.android.dx.cf.code.LineNumberList;
import com.android.dx.util.MutabilityException;

/**
 * Attribute class for standard {@code LineNumberTable} attributes.
 */
public final class AttLineNumberTable extends BaseAttribute {

	/** {@code non-null;} attribute name for attributes of this type */
	public static final String ATTRIBUTE_NAME = "LineNumberTable";

	/** {@code non-null;} list of line number entries */
	private final LineNumberList lineNumbers;

	/**
	 * Constructs an instance.
	 * 
	 * @param lineNumbers
	 *            {@code non-null;} list of line number entries
	 */
	public AttLineNumberTable(LineNumberList lineNumbers) {
		super(ATTRIBUTE_NAME);

		try {
			if (lineNumbers.isMutable()) {
				throw new MutabilityException("lineNumbers.isMutable()");
			}
		} catch (NullPointerException ex) {
			// Translate the exception.
			throw new NullPointerException("lineNumbers == null");
		}

		this.lineNumbers = lineNumbers;
	}

	/** {@inheritDoc} */
	public int byteLength() {
		return 8 + 4 * lineNumbers.size();
	}

	/**
	 * Gets the list of "line number" entries associated with this instance.
	 * 
	 * @return {@code non-null;} the list
	 */
	public LineNumberList getLineNumbers() {
		return lineNumbers;
	}
}
